Electrical controlling apparatus



Mwh 14, 1933. M B SLEEPER 1,901,673

ELECTRICAL CONTROLLING APPARATUS Filed Nov. 15, 1928 2 Sheets-Sheet l ATTORNEY March 14, 1933 M. B. SLEEPER ELECTRICAL CONTROLLING APPARATUS Filed Nov. 15, 1928 2 Sheets-Sheet 7mm wk;

INVENT I 0% WA W ATTORNEY Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE mrnron BLAKE swarm, or

ELECTRICAL CONTROLLING APPARATUS Application filed November 15, 1928. Serial No. 319,521.

My invention relates particularly to an apparatusby means of which electrical distant control of various devices may be attained as, for example, by which radiographic transmission can be accomplished,-

as by the effective transmission by radio or other suitable electrical waves, of drawings,

diagrams, hand-writing, etc. j

The object of my invention is to provide apparatus of the above kind by means of which, through the agency of electric waves, the above purpose can be accomplished, and by which, more particularly, radio waves, drawings, diagrams, writings, etc, may be readily and effectively transmitted from one point to another. Another object is to carry out such transmission in such a manner as to provide any desired number of simultaneous, reproductions thereof, accordin to the number of receivers used. A furt er object is to provide an effective graphic transmission through the agency of electric impulses which may, if desired, be in the form of audio frequencies suitable for controlling the action of the receiving apparatus.

ment in many different forms, for the purpose of illustration I have shown only certain forms of the same in the accompanying drawings, in which- Fig. l is a diagrammatic plan view of an initial sending apparatus made in accordance with my invention;

Fig. 2 is a side elevation of one of the opcrating arms shown in Fig. 1;

Fig. 3 is a diagrammatic representation of the transmitting apparatus as a whole;

Fig. 4 is a diagrammatic representation of the receiving apparatus;v I j 1 Fig. 5 is a side elevation of one of the actuating arms therein; v I

Fig. 6 is a diagram showing the arrange} ment of parts in the tuned radio frequency. set forming a part of the receiving apparatus; and

Fig. 7 is a diagrammatic representation of another form of relay circuit in the receiving set. y

In the drawings, I have shown in the transmitting apparatus a flat plate 1 havingthere: on a piece of paper 2, which may be replaced each time that a new subject is to be sent.

The paper will, of course, be maintained fixedly inits initial position by any suitable means until the entire subject has been sent. Associated with the plate 1 are two horizon} tal arms 3 and 4 having, respectively, T- shaped ends 5 and 6 with slots 7 and 8 therein. The slots 7 and 8, which cross each other at right-angles, are of sufficient length to extend throughout the entire cross dimension of the paper 2 over which it extends. At the point of intersection of the slots 7 and 8 there is pivotally supported therein a draw ing instrument 9, which may be a pencil of any desired type, a pen, or any other suitable drawing or writing instrument used in the graphic arts. The instrument 9 has a point 10, adapted to contact with the paper 2 when the apparatus is in operation, and by the movement thereof over the paper 2 at the times when the instrument 9 is in contact with said paper, any suitable graphic subject may be produced thereon, as, for example, a pencil-portrait of a person. The apparatus made in accordance with my invention will effectively transmit this subject to any desired number of different points of reception where suitable receiving sets are maintained for this purpose. It is for this purpose that the point 10 is connected to the arms 3 and 4;, the movements of which are erence, these may be called the east and west directions of movement, while the movements of arm 3 may be called the north and south 10 on the plate 1.

directions of movement. Also, the series of teeth 13 will form a number of equal subdivisions of the width of said plate 1. It will be understood, also, that the showing of the number of teeth in Fig. 2 is merely diagrammatic and that a very much larger number of teeth for the distance there represented will be used in practice, in fact, a sufiiciently large number that each tooth willrepresent the smallest distance or dimension to be dealt with in the movement of the point In the movement of the said arm two different circuits will be closed thereby according to whether the movement is towards the east or towards the west. For this purpose the arm 4 is provided with a worm thread 14 of such a pitch that by the movement of the arm 4 a worm wheel 15, located on the worm thread 14, will be readily rotated in one direction or the other. according to the direction of movement of the arm 4. It will be understood that a yoke 16, around the Wheel 15, will prevent the wheel being moved as a whole without preventing the rotation thereof by the worm 14; On the said wheel 15 there is arranged a movable contact 17 which is arranged to slide frictionally around the periphery of the wheel 7 15, the construction being such that the contact 17 will tend to remain on the periphery I of said wheel at any given point but will be conveyed around by the said wheel until stopped by coming intocontact with one or the other of two fixed contacts 18 and 19, connected by wires 20 and 21, respectively. to audio frequency oscillators 22 and 23, having frequencies different from each other and not comprising a harmonic of any of the other frequencies used in the rest of the apparatus,

' which are connected by a single lead 24 to a spring-switch arm 25 arranged to be moved by the teeth 13 on the arm 4. This arrangement is such that when the spring-switch arm 25 is depressed by one of the teeth 13, contact is made through the same with a stationary contact 26, which is connected by a wire 27 to the movable contact 17 on the wheel 15. This is so arranged that when the arm 4 is moved towards the east the contact 17 will complete the circuit through the contact 19, wire 21, oscillator '23, wire 24, switch arm 25 and wire 27, so as to cause an impulse 'to be produced by the oscillator 23 for each of the teeth 13 moved over the switch arm 25.

For the westward movement of the arm 4 the reverse series of operations takes place after the circuit has been formed between the contact 17, contact 18, wire 20, oscillator 22, wire 24, arm 25 and wire 27 thus giving out an electric impulse from the oscillator 22 for each tooth reached by the switch arm 25.

The arm 3 is likewise equipped with a second set of electrical and mechanical devices constructed in exactly the same manner, in-

cluding oscillators 28 and 29, representing.

side of the pivot, said two contacts 32 and 33 being connected by wires 34 and 35, respectively, with-an audio frequency oscillator 36, which has a frequency different from the remaining frequencies used in the apparatus. Also, the forward end of the arm 4, which underlies the forward end of the arm 3, has a stop 37 cooperating with a stop 38 on the rearward portion of said arm 4 to limit the upward movement of the point 10 to its position when moved from the paper 2, a spring 39 connecting the forward end of the instrument 9 to a fixed rod 40 on the. rearward end of said arm to normally move the said forward end of the arm upwardly when not in action.

By this means the movement of the point 10 is translated into one of four audio frequency impulses or combinations thereof, according to the movement of the point 10 on the paper 2, and when the point 10 is brought into contact with the paper 2 a fifth audio frequency is brought into action,

accordingly. It will be understood, however, that, if desired, instead'of the audio frequency 36 and the circuit including it, there may be a manually operated switch capable of being moved separately for this purpose to actuate the audio frequency 36 instead of automatically accomplishing the same by the movement of the forward end of the arm 4. Also, it will be understood that. if desired, two or more-of such manually operated switches, or such abtomati-r cally operated switches. as shown in Fig. 2,

attached to the forward end of the arm 4, may be used to determine different planes or different vertical positions of the point 10 in case it is desired to transmit motions of said point 10 in more than one. plane. These five audio frequencies 28, 23, 29, 22 and 36 are. directed into-a microphone 41,

connected with a'suitable battery 42 in a circuit 44 of any desired type. This loudspeaker 44 is in turn arranged to transmit sound waves corresponding to the impulses above referred to, into aradio broadcast microphone 45, which forms a part, in the usual way, of a radio broadcast transmitting set of any desired type. For this purpose it is to be understood, also, that, if desired,

instead of the broadcast transmitting set intended to broadcast electric waves through the air, metallic electrical circuits may be provided to transmit the impulses to the receiving point.

with a jack 49 as a place for plugging in the usual loud speaker. Instead, or together with the loud speaker, if desired, there is provided in this instance, however, an audio frequency filter which is plugged into the jack 49. This filter may be of a mechanical type, or may be an electric filter, as indicated in the drawings, the same comprisin a series of primary coils 50, 51, 52, 53 an 54, corresponding in number to the frequencies of the five oscillators 28, 23, 29, 22 and 36, andsecondary coils 55, 56, 57, 58 and '59, each of which is tuned to the respective frequencies of the oscillators 28, 23, 29, 22 and 36. These secondary coils 55, 56, 57, 58 and 59 are tuned to the particular frequencies by means of condensers 60, 61, 62,63 and 64, located in rela circuits 65, 66, 67, 68 and 69, respective y, all of which are constructed substan tially alike so far as the circuits and relays are concerned. For exam le,-the circuit 67 is provided with a relay; 0 of any desired type for magnifying vt e electric current, similar relays being connectedflto the other circuits firstreferred to. The circuit 67, controls the north movement of a north and south arm 71 which is supported in ball-bearings 72 and 73 in the same manner as in the case of the arms 3 and 4. When north movement of the arm 71 is produced, this is ac-,

of teeth' 13 on the arm 4 an on the arm 3,

and the series of teeth in; the said'two racks evenly divide the racks into the same number of intervals as in the case of said teeth I on the arms 3 and 4. The forward end of the arm 71 is connected by a ivot 79 to the end carrying the racks 74 an 78, and when the circuit 69 is completed, this actuates a relay 80 which cooperates with an armature 81 supported on the forward end of the arm 71 to move the same downwardly until an instrument 82, carrying a int 83, which is ivoted in theforward en of said arm 71, is in contact with a sheet of in a fixed position on a at late 85. The

. instrument 82 may be of any esired type, as

described in connection with the instrument 9 in the transmitting apparatus, the instrument 82 being similarly pivoted in a slotted cross-head 86 formed in the extreme inner end of the arm 71. A spring 87, attached to the forward end of the arm 71, normally holds the same upwardly until a stop 88 thereon contacts w1th a sto 89 on the rearward end of said arm, sai spring 87 being attached at one end to the forward end of the arm 71, and at. its rearward end to a fixed rod 90 secured to the rear end of said arm. Inasmuch as the slotted end 86 of the arm .71 underlies the forward end of an east and west arm 91, which is also provided with a pivot 92 in a similar manner, said spring 87 will elevate both the inner ends of said arms 71 and 91 when the instrument is not in use. It will be understood, of course, that the inner arm 91 is provided with a slotted crosshead 93 through which the instrument 82 is also pivoted in a manner similar to the pivoting of said instrument 82, in the slotted cross-head 86. Also, it will be understood that the said arm 91 will be provided with the same type of mechanical and electrical connections as described in detail in connection with the arm 71, so as to cause the same to move east or west through the agency of the circuits 66 and 68 when impulses are produced therein.

The said receiving set 46, as above indicated, may be of any desired construction but, by way of example, it may be comprised of a tuned radio frequency circuit 94, a detector 95 and an audio frequency amplifying circuit 96.'

' It'will be understood that where the transmitting set is provided, as above described, with additional oscillators for operation of the point 10 in additional planes, the receiving set will be rovided with'additional relay circuits an actuating parts for o rating the point 83 in such additional p anes, when desired. Furthermore, in constructing the receiving apparatus, if desired, different types of tuning apparatus for the relay circuits may be used, as, for instance, a secondary coil 97 having a condenser 98 in a circuit 99 therewith, as well as a vacuum tube amplifier 100 in'said circuit and connected to a relay 101 corresponding to each of the relays .70, 76'and so.

paper 84 supported As a result of the use of the audio frequency filter, etc., it will be understood that only certain waves will affect the several parts of the apparatus, and that, accordingly, the apparatus will be substantiall unaffected by static and variations in the lntensity of the transmitted impulses will have substantially no effect upon the operationof the apparatus.

Also, it will be understood that many different kinds flof movements for different types of apparatus may be transmitted in thls way. While I have described my invention above in detail I wish it to be understood that many changes may be made therein without departing from the spirit of the same.

I claim:

1. In combination, means for producing graphic subjects, a radiographic transmission apparatus connected thereto ada ted to operate by transmitting different au io frequencies according to the movements of the producing means, means for registering the transmitted radiographic subject, and a radiographic receivin apparatus for actu-' ing t e same from t e transmittin up aratus by means of the different audio requencies received from the transmitting apparatus, the receiving apparatus com rising a filter for separating the transmitted audio frequencies, a separate audio frequency being provided foreach direction of movement of the ap aratus in the three dimensions in the pro notion of the two dimensional subject transmitted.

2. In combination, means for producing graphic subjects, a transmission apparatus connected thereto adapted to operate by transmitting different audio frequencies according to the movements of the producing means, for transmitting electric impulses corresponding to unit distances in a given linear direction produced in said graphic subject, means for registering the transmitted graphic subject, and electrical apparatus for actuating the same from the transmission apparatus by means of the different audio frequencies received from the transmitting apparatus.

3. In combination, means for producing graphic subjects, a transmission apparatus connected thereto adapted to operate by transmitting different audio frequencies according to themovements of the producing means, for transmittin electric impulses correspondin to unit istances in a given linear direction produced in said graphic subject, means for registering the transmitted graphic subject, and electrical apparatus for actuating the same. from the transmission apparatus by means of the difierent audio frequencies received from the transmitting apparatus, the receiving apparatus comprisin a filter for separating the transmitted apparatus by means of the different audio frequencies received from the transmitting apparatus, the receiving apparatus comprising a filter for separating the transmltted audio frequencies, a separate audio frequency being provided for each direction of movement in the production of the subject transmitted. r

'5. In combination, means for producing graphic subjects, a transmission apparatus connected thereto adapted to operate by transmitting different audio frequencies according to the movements of the producing means, for transmitting electric impulses correspondin to unit distances in a given linear direction roduced in said graphic subject, means or registering the transmitted graphic subject, and electrical apparatusfor actuating the same. from the transmission apparatus by means of the different ,audio frequencies received from the transmittin comprising a filter for separating the transmittedaudio frequencies, a separate audiofrequency beingprovided foreach direction of movement 1n the two dimensions of a given plane in the production of the subject transmitted.

I ,6. In combination, means for producing graphic sub'ects, a transmission apparatus connected t ereto adapted to operate by transmitting difierentaudio frequencies ac? cording to'the movements ofthe producing meansfor transmitting electric impulses correspondin to unit distances in a plurality of given mear directions in a particular plane produced in said raphic subject, means for registering t e transmitted graphic subject, and electrical apparatus for actuating the same from the transmission apparatus by means of the different audio frequencies received from the transmitting apparatus, the. receiving apparatus comprising a filter-for separating the transmltted audio frequencies and a separate audio frequency being provided for each direction of movement in the two dimensions of a given plane in the production of the subject transmitted.

7. In combination, a means for producing graphic subjects, a radiographic-transmission apparatus connected thereto ada t apparatus, the receiving apparatus 3 operate by transmitting diflerent uencies in a succession of electric impulses o different frequencies means for registering the transmitted radiographic sub'ect by means 5 of impulses of the different uencies received from the transmitting apparatus, and a radiographic receiving a paratus for actuating the same from t e transmitting apparatus substantially unafiected by the 10' am litude of the frequencies transmitted. In testimony that I claim the foregoing, I have hereunto set my hand this 8th day of November, 1928.

w MILTON BLAKE sLEEPEE 

